formatter.h (_Debug_msg_id): Add __msg_valid_load_factor.

formatter.h (_Debug_msg_id): Add __msg_valid_load_factor.

2012-10-18  François Dumont  <fdumont@gcc.gnu.org>

	* include/debug/formatter.h (_Debug_msg_id): Add
	__msg_valid_load_factor.
	* include/debug/macros.h (__glibcxx_check_max_load_factor): New.
	* include/debug/unordered_set
	(unordered_set<>::max_load_factor(float)): Check max load factor
	is positive.
	(unordered_multiset<>::max_load_factor(float)): Likewise.
	* include/debug/unordered_map
	(unordered_map<>::max_load_factor(float)): Likewise.
	(unordered_multimap<>::max_load_factor(float)): Likewise.
	* testsuite/23_containers/unordered_map/debug/max_load_factor_neg.cc:
	New.
	* testsuite/23_containers/unordered_multimap/debug/
	max_load_factor_neg.cc: New.
	* testsuite/23_containers/unordered_set/debug/max_load_factor_neg.cc:
	New.
	* testsuite/23_containers/unordered_multiset/debug/
	max_load_factor_neg.cc: New.

From-SVN: r192575